Why is Saturday stronger than Monday?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

What type of tree can I carry in my hand?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

If two's company, and three's a crowd, then whats four and five ?

No matter how little or how much you use me, you change me every month. What am I?

Which alphabet letter is a question?

Can you solve the below tricky visual equation?

How many times can you subtract the number two from the number fifty?